INTRODUCTION TO THE PROCEEDINGS VOLUME OF THE SECOND RUSSIA–CHINA INTERNATIONAL MEETING ON THE CENTRAL ASIAN OROGENIC BELT

Second Russia-China International Meeting on the Central Asian Orogenic Belt (September 6–8th, 2017, Irkutsk, Russia) with post-conference excursion (September 9–12th, 2017, Baikal area, Siberia, Russia) continues tradition of the Russian-Chinese conferences begun in 2015.Second Russia-China International Meeting on the Central Asian Orogenic Belt (September 6–8th, 2017, Irkutsk, Russia) with post-conference excursion (September 9–12th, 2017, Baikal area, Siberia, Russia) continues tradition of the Russian-Chinese conferences begun in 2015

LATE MESOZOIC GRANITOIDS OF THE WESTERN TRANSBAIKALIA (RUSSIA) AND THEIR RELATION TO FORMATION OF METAMORPHIC CORE COMPLEXES

Early Cretaceous metamorphic core complexes (MCCs) are widespread in North-East Asia and indicate a large-scale crustal extension in this area [Wang et al., 2011, 2012]. Traditionally one of the formation mechanisms of MCCs is related to various magmatic activities including granitoid magmatism [Anderson et al., 1988, Hill et al., 1995; Lister, Baldwin, 1993]. Wang et al. [2012] have subdivided the intrusion associated with MCCs in NE Asia into pre-kinematic (~170–140 Ma), syn-kinematic (~150–125 Ma) and post-kinematic (~125–110 Ma). 40Ar/39Ar biotite and hornblende ages of 140–110 Ma are overlapping for all MCCs of NE Asia and represent the time of the final stage of the MCCs formation [Wang et al., 2012]. Here, we present overview of geochronological and geochemical data for Late Mesozoic granitoids of the Western Transbaikalia and our view on their role in formation of Transbaikalian MCCs.Early Cretaceous metamorphic core complexes (MCCs) are widespread in North-East Asia and indicate a large-scale crustal extension in this area [Wang et al., 2011, 2012]. Traditionally one of the formation mechanisms of MCCs is related to various magmatic activities including granitoid magmatism [Anderson et al., 1988, Hill et al., 1995; Lister, Baldwin, 1993]. Wang et al. [2012] have subdivided the intrusion associated with MCCs in NE Asia into pre-kinematic (~170–140 Ma), syn-kinematic (~150–125 Ma) and post-kinematic (~125–110 Ma). 40Ar/39Ar biotite and hornblende ages of 140–110 Ma are overlapping for all MCCs of NE Asia and represent the time of the final stage of the MCCs formation [Wang et al., 2012]. Here, we present overview of geochronological and geochemical data for Late Mesozoic granitoids of the Western Transbaikalia and our view on their role in formation of Transbaikalian MCCs

К 60-ЛЕТНЕМУ ЮБИЛЕЮ ЧЛЕНА-КОРРЕСПОНДЕНТА РАН ЕВГЕНИЯ ВИКТОРОВИЧА СКЛЯРОВА

The article is devoted to the 60th Jubilee of Evgeny V. Sklyarov, a recognized expert in a wide variety of igneous and metamorphic processes and geodynamics. He is a Corresponding Member of the Russian Academy of Sciences, Professor, Doctor of Geology and Mineralogy, Chief Researcher of Laboratory of Paleogeodynamics in IEC SB RAS, and Chief Editor of Geodynamics and Tectonophysics.Статья посвящена 60-летию авторитетного специалиста в широкой области магматических и метаморфических процессов и геодинамики, члена-корреспондента РАН, доктора геолого-минералогических наук, главного научного сотрудника лаборатории палеогеодинамики ИЗК СО РАН, главного редактора журнала «Геодинамика и тектонофизика», профессора Евгения Викторовича Склярова

ИНСТИТУТУ ЗЕМНОЙ КОРЫ СИБИРСКОГО ОТДЕЛЕНИЯ РАН 65 ЛЕТ: СОВРЕМЕННОЕ СОСТОЯНИЕ И ВЗГЛЯД В БУДУЩЕЕ

 In February 2014, the Institute of the Earth’s Crust of Siberian Branch of the Russian Academy of Sciences celebrated its 65th anniversary. As of 01 January 2014, there are 300 employees in its staff, including one Full Member of RAS, one Corresponding Member of RAS, 27 Doctors and 74 Candidates of Sciences. Postgraduate courses are taken by 33 young researchers. The Institute has 13 laboratories and the Analytical Centre to research recent endo- and exogeodynamics, geological environment and seismicity, mineral resources, underground water dynamics and geoecology, internal structure, paleogeodynamics, endogenic processes and fluid dynamics of the continental lithosphere. From 2009 to 2013, the Institute has published 775 scientific papers in Russia and abroad, implemented 145 projects supported by grants from the Russian Foundation for Basic Research, 21 projects under the Fundamental Research Program of the RAS Presidium and the Earth Sciences Section of RAS, 27 integration projects of SB RAS, and 22 programs of fundamental studies of RAS. The Institute fulfilled more than 50 scientific research contracts with industrial companies in Siberia and several state contracts with governments of the RF regions. Educational research, science organization and international activities are successfully implemented. Renovation and retrofit replacement of equipment, instruments and tools is ensured. A fitting testimony to scientific achievements of IEC SB RAS is that it ranks among leading research institutes in the Earth sciences in Russia and abroad, as confirmed by all the RAS performance indicators.   В феврале 2014 г. Институту земной коры Сибирского отделения Российской академии наук исполнилось 65 лет. На начало 2014 г. в институте трудится около 300 сотрудников, среди которых 1 действительный член РАН, 1 член-корреспондент РАН, 27 докторов и 74 кандидата наук. Обучение в аспирантуре проходят 33 будущих молодых ученых. В структуре института функционирует 13 лабораторий и Аналитический центр, сотрудники которых выполняют исследования по следующим основным научным направлениям: современная эндо- и экзогеодинамика, геологическая среда и сейсмический процесс, ресурсы, динамика подземных вод и геоэкология, внутреннее строение, палеогеодинамика, эндогенные процессы и флюидодинамика континентальной литосферы. За период с 2009 по 2013 г. в институте опубликовано 775 статей в российских и зарубежных научных журналах, выполнено 145 грантов РФФИ, 21 проект по программам фундаментальных исследований Президиума РАН и Отделения наук о Земле РАН, 27 интеграционных проектов СО РАН, 22 программы фундаментальных исследований РАН, заключено и успешно исполнено более 50 договоров НИОКР с крупными промышленными организациями Сибири, а также ряд государственных контрактов с правительствами субъектов РФ. В институте активно развивается научно-педагогическая, научно-организационная и международная деятельность, обновляется и модернизируется материально-техническая и приборно-аналитическая база. По всем показателям, обозначенным в ходе реформы РАН в качестве основных критериев оценки результативности научных организаций, ИЗК СО РАН занимает достойное место среди институтов-лидеров страны и мира, выполняющих исследования в области наук о Земле.

EARLY STAGE OF THE CENTRAL ASIAN OROGENIC BELT BUILDING: EVIDENCES FROM THE SOUTHERN SIBERIAN CRATON

The origin of the Central-Asian Orogenic Belt (CAOB), especially of its northern segment nearby the southern margin of the Siberian craton (SC) is directly related to development and closure of the Paleo-Asian Ocean (PAO). Signatures of early stages of the PAO evolution are recorded in the Late Precambrian sedimentary successions of the Sayan-Baikal-Patom Belt (SBPB) on the southern edge of SC. These successions are spread over 2000 km and can be traced along this edge from north-west (Sayan area) to south-east (Baikal area) and further to north-east (Patom area). Here we present the synthesis of all available and reliable LA-ICP-MS U-Pb geochronological studies of detrital zircons from these sedimentary successions.The origin of the Central-Asian Orogenic Belt (CAOB), especially of its northern segment nearby the southern margin of the Siberian craton (SC) is directly related to development and closure of the Paleo-Asian Ocean (PAO). Signatures of early stages of the PAO evolution are recorded in the Late Precambrian sedimentary successions of the Sayan-Baikal-Patom Belt (SBPB) on the southern edge of SC. These successions are spread over 2000 km and can be traced along this edge from north-west (Sayan area) to south-east (Baikal area) and further to north-east (Patom area). Here we present the synthesis of all available and reliable LA-ICP-MS U-Pb geochronological studies of detrital zircons from these sedimentary successions

Временные рубежи крупных изверженных провинций России: предварительный обзор

This is an initial step toward a full-scale review paper and map of Large Igneous Provinces (LIPs) for Russia

ГЛУБИННОЕ СТРОЕНИЕ И ПАЛЕОГЕОДИНАМИКА СИБИРИ И ЦЕНТРАЛЬНОЙ АЗИИ В РАБОТАХ ИНСТИТУТА ЗЕМНОЙ КОРЫ СО РАН (2009–2013 ГГ.)

The deep structure and paleogeodynamics of the Siberian craton and the Central Asian folded belt are studied by two specialized laboratories of the Institute of the Earth’s Crust, SB RAS – the Laboratory of Complex Geophysics and the Laboratory of Paleogeodynamics. A variety of modern geophysical methods is applied. Surface wave tomography is focused on determination of 3D velocity structure of the upper mantle. Seismic, gravimetric and electrical surveys are aimed at stu­dies of structures of the crust and the upper mantle. Geothermic parameters of the lithosphere in Central Asia are measured. In search for mineral resources, new geophysical prospecting technologies are developed. Quality paleogeodynamics reconstructions require a proper understanding of the structural evolution of the Siberian craton and the Central Asian folded belt. Researches in this scientific field are conducted by the Laboratory of Paleogeodynamics. Besides, the Laboratory studies new minerals and conditions of their formation. Some of the scientific research projects are jointly implemented by the two laboratories, and research results are regularly published in Russia and abroad.   Изучением глубинного строения и палеогеодинамики Сибирского кратона и Центрально-Азиатского складчатого пояса занимаются две специализированные лаборатории ИЗК СО РАН: лаборатория комплексной геофизики и лаборатория палеогеодинамики. Использование геофизических методов в рамках данной тематики ориентировано на определение трехмерной скоростной структуры верхней мантии методом поверхностно-волновой томографии, изучение строения земной коры и верхней мантии сейсмическими, гравиметрическими и электроразведочными методами, измерение геотермических параметров литосферы Центральной Азии и разработку новых технологий поиска месторождений полезных ископаемых. Выполнение качественных палеогеодинамических реконструкций требует расшифровки сценария становления структуры Сибирского кратона и Центрально-Азиатского складчатого пояса. Исследованием этой проблемы занимаются сотрудники лаборатории палеогеодинамики. Отдельным направлением в данной лаборатории является изучение новых минералов и выяснение условий их образования. Сотрудники лабораторий ведут скоординированные научные исследования, результаты которых активно публикуются в ведущих российских и зарубежных научных изданиях.

Microfossils of the late proterozoic debengdinskaya formation of the olenekskiy uplift

Microfossils from the Middle Riphean Debengdinskaya formation of the Olenekskiy uplift have been studied. Various stenoorganic forms of acritarchs and cyanobacteries are described. Morphological groups which are preliminary compared with large flora taxons are allocated among acritarchs : brown and green seaweed, mushrooms, seaweed located in symbiotic relations (?) with cyanobionts. The prematurity of radical conclusions about age of the deposit based on majority of Proterozoic microfossils is underline

Geodynamic Significance of the Mesoproterozoic Magmatism of the Udzha Paleo-Rift (Northern Siberian Craton) Based on U-Pb Geochronology and Paleomagnetic Data

The emplacement age of the Great Udzha Dyke (northern Siberian Craton) was determined by the U-Pb dating of apatite using laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS). This produced an age of 1386 +/- 30 Ma. This dyke along with two other adjacent intrusions, which cross-cut the sedimentary units of the Udzha paleo-rift, were subjected to paleomagnetic investigation. The paleomagnetic poles for the Udzha paleo-rift intrusions are consistent with previous results published for the Chieress dyke in the Anabar shield of the Siberian Craton (1384 +/- 2 Ma). Our results suggest that there was a period of intense volcanism in the northern Siberian Craton, as well as allow us to reconstruct the apparent migration of the Siberian Craton during the Mesoproterozoic.Peer reviewe